[Ozuru]

Originally Posted by nickmcski

Hum, The only think I can think of is the driver station may be using a different java version if you have multiple java installs on your computer. I cant access the SFX code from this laptop but when I get home I will make sure its not checking for any weird arguments from the driver station.

The other thing you can try (If you have a java JDK installed and correctly added to your path variable) is to start the dashboard with the driver station then open the command prompt and type

jps

That will list the java process ID for every java application running, remember the number associated with smart dashboard then you can run the command

jstack <Number Here>

That will print out a list of all the java threads currently running and the stack trace to go with them, if you can copy them then post them back here I can look through them and see if there is anything out of the ordinary, (Like its stuck trying to load a plugin or didn't start a thread correctly)

Thanks for the reply, Nick. I checked my installs and I had two others -- now I'm only using Java 8 Update 25 and the JDK 8 Update 25.

Here's the result of its stack trace:

C:\WINDOWS\system32>jstack 5480
2015-02-10 16:02:43
Full thread dump Java HotSpot(TM) 64-Bit Server VM (25.25-b02 mixed mode):

"TimerQueue" #28 daemon prio=5 os_prio=0 tid=0x0000000018802800 nid=0x14d0 waiti
ng on condition [0x000000001d10e000]
   java.lang.Thread.State: WAITING (parking)
        at sun.misc.Unsafe.park(Native Method)
        - parking to wait for  <0x00000000a4aca258> (a java.util.concurrent.lock
s.AbstractQueuedSynchronizer$ConditionObject)
        at java.util.concurrent.locks.LockSupport.park(Unknown Source)
        at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject
.await(Unknown Source)
        at java.util.concurrent.DelayQueue.take(Unknown Source)
        at javax.swing.TimerQueue.run(Unknown Source)
        at java.lang.Thread.run(Unknown Source)

"Client Connection Reader Thread" #27 prio=6 os_prio=0 tid=0x00000000187c7000 ni
d=0x1520 runnable [0x000000001c9ff000]
   java.lang.Thread.State: RUNNABLE
        at java.net.SocketInputStream.socketRead0(Native Method)
        at java.net.SocketInputStream.read(Unknown Source)
        at java.net.SocketInputStream.read(Unknown Source)
        at java.io.BufferedInputStream.fill(Unknown Source)
        at java.io.BufferedInputStream.read(Unknown Source)
        - locked <0x00000000a4ac92a8> (a java.io.BufferedInputStream)
        at java.io.DataInputStream.readByte(Unknown Source)
        at edu.wpi.first.wpilibj.networktables2.connection.NetworkTableConnectio
n.read(NetworkTableConnection.java:115)
        at edu.wpi.first.wpilibj.networktables2.connection.ConnectionMonitorThre
ad.run(ConnectionMonitorThread.java:30)
        at edu.wpi.first.wpilibj.networktables2.thread.DefaultThreadManager$Peri
odicNTThread$1.run(DefaultThreadManager.java:18)
        at java.lang.Thread.run(Unknown Source)

"D3D Screen Updater" #26 daemon prio=7 os_prio=1 tid=0x0000000018551000 nid=0x14
90 in Object.wait() [0x000000001c4ef000]
   java.lang.Thread.State: TIMED_WAITING (on object monitor)
        at java.lang.Object.wait(Native Method)
        at sun.java2d.d3d.D3DScreenUpdateManager.run(Unknown Source)
        - locked <0x00000000a4aca4a8> (a java.lang.Object)
        at java.lang.Thread.run(Unknown Source)

"DestroyJavaVM" #25 prio=5 os_prio=0 tid=0x0000000002410800 nid=0x1234 waiting o
n condition [0x0000000000000000]
   java.lang.Thread.State: RUNNABLE

"Swing-Shell" #18 daemon prio=6 os_prio=0 tid=0x0000000018405800 nid=0x13bc wait
ing on condition [0x000000001a9be000]
   java.lang.Thread.State: WAITING (parking)
        at sun.misc.Unsafe.park(Native Method)
        - parking to wait for  <0x00000000a4aca828> (a java.util.concurrent.lock
s.AbstractQueuedSynchronizer$ConditionObject)
        at java.util.concurrent.locks.LockSupport.park(Unknown Source)
        at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject
.await(Unknown Source)
        at java.util.concurrent.LinkedBlockingQueue.take(Unknown Source)
        at java.util.concurrent.ThreadPoolExecutor.getTask(Unknown Source)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
        at sun.awt.shell.Win32ShellFolderManager2$ComInvoker$3.run(Unknown Sourc
e)
        at java.lang.Thread.run(Unknown Source)

"Write Manager Thread" #15 prio=6 os_prio=0 tid=0x0000000018376000 nid=0x464 wai
ting on condition [0x0000000018c5f000]
   java.lang.Thread.State: TIMED_WAITING (sleeping)
        at java.lang.Thread.sleep(Native Method)
        at edu.wpi.first.wpilibj.networktables2.WriteManager.run(WriteManager.ja
va:148)
        at edu.wpi.first.wpilibj.networktables2.thread.DefaultThreadManager$Peri
odicNTThread$1.run(DefaultThreadManager.java:18)
        at java.lang.Thread.run(Unknown Source)

"AWT-EventQueue-0" #14 prio=6 os_prio=0 tid=0x0000000017770800 nid=0x7ec waiting
 on condition [0x000000001835f000]
   java.lang.Thread.State: WAITING (parking)
        at sun.misc.Unsafe.park(Native Method)
        - parking to wait for  <0x00000000a49da150> (a java.util.concurrent.lock
s.AbstractQueuedSynchronizer$ConditionObject)
        at java.util.concurrent.locks.LockSupport.park(Unknown Source)
        at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject
.await(Unknown Source)
        at java.awt.EventQueue.getNextEvent(Unknown Source)
        at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
        at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
        at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
        at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
        at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
        at java.awt.EventDispatchThread.run(Unknown Source)

"AWT-Windows" #12 daemon prio=6 os_prio=0 tid=0x000000001776e800 nid=0x870 runna
ble [0x000000001813f000]
   java.lang.Thread.State: RUNNABLE
        at sun.awt.windows.WToolkit.eventLoop(Native Method)
        at sun.awt.windows.WToolkit.run(Unknown Source)
        at java.lang.Thread.run(Unknown Source)

"AWT-Shutdown" #11 prio=5 os_prio=0 tid=0x000000001776d800 nid=0xdac in Object.w
ait() [0x000000001803e000]
   java.lang.Thread.State: WAITING (on object monitor)
        at java.lang.Object.wait(Native Method)
        - waiting on <0x00000000a4acad50> (a java.lang.Object)
        at java.lang.Object.wait(Unknown Source)
        at sun.awt.AWTAutoShutdown.run(Unknown Source)
        - locked <0x00000000a4acad50> (a java.lang.Object)
        at java.lang.Thread.run(Unknown Source)

"Java2D Disposer" #10 daemon prio=10 os_prio=2 tid=0x000000001776b800 nid=0x1270
 in Object.wait() [0x0000000017f3f000]
   java.lang.Thread.State: WAITING (on object monitor)
        at java.lang.Object.wait(Native Method)
        - waiting on <0x00000000a49bf360> (a java.lang.ref.ReferenceQueue$Lock)
        at java.lang.ref.ReferenceQueue.remove(Unknown Source)
        - locked <0x00000000a49bf360> (a java.lang.ref.ReferenceQueue$Lock)
        at java.lang.ref.ReferenceQueue.remove(Unknown Source)
        at sun.java2d.Disposer.run(Unknown Source)
        at java.lang.Thread.run(Unknown Source)

"Service Thread" #9 daemon prio=9 os_prio=0 tid=0x000000001746f800 nid=0x124c ru
nnable [0x0000000000000000]
   java.lang.Thread.State: RUNNABLE

"C1 CompilerThread2" #8 daemon prio=9 os_prio=2 tid=0x0000000015bf6000 nid=0x14b
c waiting on condition [0x0000000000000000]
   java.lang.Thread.State: RUNNABLE

"C2 CompilerThread1" #7 daemon prio=9 os_prio=2 tid=0x0000000015bf1000 nid=0x14c
0 waiting on condition [0x0000000000000000]
   java.lang.Thread.State: RUNNABLE

"C2 CompilerThread0" #6 daemon prio=9 os_prio=2 tid=0x0000000015bed000 nid=0xa98
 waiting on condition [0x0000000000000000]
   java.lang.Thread.State: RUNNABLE

"Attach Listener" #5 daemon prio=5 os_prio=2 tid=0x0000000015bea800 nid=0xf78 wa
iting on condition [0x0000000000000000]
   java.lang.Thread.State: RUNNABLE

"Signal Dispatcher" #4 daemon prio=9 os_prio=2 tid=0x0000000015bea000 nid=0x167c
 runnable [0x0000000000000000]
   java.lang.Thread.State: RUNNABLE

"Finalizer" #3 daemon prio=8 os_prio=1 tid=0x0000000015bb7800 nid=0x1678 in Obje
ct.wait() [0x0000000016f4f000]
   java.lang.Thread.State: WAITING (on object monitor)
        at java.lang.Object.wait(Native Method)
        at java.lang.ref.ReferenceQueue.remove(Unknown Source)
        - locked <0x00000000a4bd0d10> (a java.lang.ref.ReferenceQueue$Lock)
        at java.lang.ref.ReferenceQueue.remove(Unknown Source)
        at java.lang.ref.Finalizer$FinalizerThread.run(Unknown Source)

"Reference Handler" #2 daemon prio=10 os_prio=2 tid=0x00000000024fe000 nid=0x175
8 in Object.wait() [0x0000000016e4f000]
   java.lang.Thread.State: WAITING (on object monitor)
        at java.lang.Object.wait(Native Method)
        at java.lang.Object.wait(Unknown Source)
        at java.lang.ref.Reference$ReferenceHandler.run(Unknown Source)
        - locked <0x00000000a4b23f48> (a java.lang.ref.Reference$Lock)

"VM Thread" os_prio=2 tid=0x0000000015bb6800 nid=0x1378 runnable

"GC task thread#0 (ParallelGC)" os_prio=0 tid=0x0000000002426000 nid=0x156c runn
able

"GC task thread#1 (ParallelGC)" os_prio=0 tid=0x0000000002428000 nid=0x15ac runn
able

"GC task thread#2 (ParallelGC)" os_prio=0 tid=0x0000000002429800 nid=0x1574 runn
able

"GC task thread#3 (ParallelGC)" os_prio=0 tid=0x000000000242b800 nid=0x1578 runn
able

"VM Periodic Task Thread" os_prio=2 tid=0x0000000017472000 nid=0x678 waiting on
condition

JNI global references: 373

Once I removed the two other Java installations I had for Java 7 it allowed me to select my plugin but, again, the camera widget isn't working. Simple Camera Viewer is but Camera does not -- any ideas?

Thanks!